#!/usr/bin/env bash
# I'm a bonsai-making machine!
#################################################
##
# author: John Allbritten
# license: GPLv3
# repo: https://gitlab.com/jallbrit/bonsai.sh
#
# this script is constantly being updated, so
# check repo for most up-to-date version.
##
#################################################
# ------ vars ------
# CLI options
live=0
infinite=0
nfetch=0
termSize=1
termColors=0
leafStrs='&'
baseType=1
message=""
multiplier=5
lifeStart=28
timeStep=0.03
timeWait=4
flag_m=0
flag_h=0
# non-CLI options
messageWidth=20
verbose=0
seed="$RANDOM"
# ensure locale is correct
LC_ALL="en_US.UTF-8"
# ensure Bash version >= 4.0
if ((BASH_VERSINFO[0] < 4)); then
printf '%s\n' "Error: bonsai.sh requires Bash v4.0 or higher. You have version $BASH_VERSION."
fi
# ensure MacOS compatibility with GNU getopt
if [[ "$OSTYPE" == 'darwin'* ]]; then
GGETOPT=/usr/local/Cellar/gnu-getopt/*/bin/getopt # should find gnu-getopt
if [ ! -x $GGETOPT ]; then # file is not executable
printf '%s\n' 'Error: Running on MacOS requires an executable gnu getopt.'
exit 2
fi
shopt -s expand_aliases
alias getopt='$GGETOPT' # replace getopt with gnu getopt
fi
# ------ parse options ------
OPTS="hlt:w:ig:c:Tm:b:M:L:s:vn" # the colon means it requires a value
LONGOPTS="help,live,time:,wait:,infinite,geometry:,leaf:,termcolors,message:,base:,multiplier:,life:,seed:,verbose,neofetch"
parsed=$(getopt --options=$OPTS --longoptions=$LONGOPTS -- "$@")
eval set -- "${parsed[@]}"
while true; do
case "$1" in
-h|--help)
flag_h=1
shift
;;
-l|--live)
live=1
shift
;;
-t|--time)
timeStep="$2"
shift 2
;;
-w|--wait)
timeWait="$2"
shift 2
;;
-g|--geometry)
termSize=0
geometry="$2"
shift 2
;;
-c|--leaf)
leafStrs="$2"
shift 2
;;
-T|--termcolors)
termColors=1
shift
;;
-m|--message)
flag_m=1
message="$2"
shift 2
;;
-b|--base)
baseType="$2"
shift 2
;;
-i|--infinite)
infinite=1
shift 1
;;
-M|--multiplier)
multiplier="$2"
shift 2
;;
-L|--life)
lifeStart="$2"
shift 2
;;
-s|--seed)
RANDOM="$2"
shift 2
;;
-v|--verbose)
verbose=1
shift 1
;;
-n|--neofetch)
nfetch=1
shift 1
;;
--) # end of arguments
shift
break
;;
*)
printf '%s\n' "error while parsing CLI options"
flag_h=1
;;
esac
done
# ------ check input ------
# ensure integer values
if ! [ "$lifeStart" -eq "$lifeStart" 2> /dev/null ]; then
printf '%s\n' "--life ($lifeStart) invalid: must be an integer"; exit 1
elif ! [ "$multiplier" -eq "$multiplier" 2> /dev/null ]; then
printf '%s\n' "--multiplier ($multiplier) invalid: must be an integer"; exit 1
elif ! [ "$baseType" -eq "$baseType" 2> /dev/null ]; then
printf '%s\n' "--base ($baseType) invalid: must be an integer"; exit 1
# ensure ranges
elif [ "$baseType" -lt 0 ]; then
printf '%s\n' "--base ($baseType) invalid: out of range"; exit 1
elif [ "$lifeStart" -lt 1 ] || [ "$lifeStart" -gt 200 ]; then
printf '%s\n' "--life ($lifeStart) invalid: out of range"; exit 1
elif [ "$multiplier" -lt 0 ] || [ "$multiplier" -gt 20 ]; then
printf '%s\n' "--multiplier ($multiplier) invalid: out of range"; exit 1
elif [ "$seed" -lt 0 ] || [ "$seed" -gt 32767 ]; then
printf '%s\n' "--seed ($seed) invalid: out of range"; exit 1
# ensure floats are less than 0
elif [ "$(printf '%s\n' "$timeStep < 0" | bc -l)" -eq 1 ]; then
printf '%s\n' "--timestep ($timeStep) invalid: out of range"; exit 1
elif [ "$(printf '%s\n' "$timeWait < 0" | bc -l)" -eq 1 ]; then
printf '%s\n' "--wait ($timeWait) invalid: out of range"; exit 1
fi
HELP="\
Usage: bonsai [OPTIONS]
bonsai.sh is a beautifully random bonsai tree generator.
optional args:
-l, --live live mode
-t, --time TIME in live mode, minimum time in secs between
steps of growth [default: 0.03]
-i, --infinite infinite mode
-w, --wait TIME in infinite mode, time in secs between
tree generation [default: 4]
-n, --neofetch neofetch mode
-m, --message STR attach message next to the tree
-T, --termcolors use terminal colors
-g, --geometry X,Y set custom geometry
-b, --base INT ascii-art plant base to use, 0 is none
-c, --leaf STR1,STR2,STR3... list of strings randomly chosen for leaves
-M, --multiplier INT branch multiplier; higher -> more
branching (0-20) [default: 5]
-L, --life INT life; higher -> more growth (0-200) [default: 28]
-s, --seed INT seed random number generator (0-32767)
-v, --verbose print information each step of generation
-h, --help show help"
if ((flag_h)); then
printf '%s\n' "$HELP"
exit 0
fi
shopt -s checkwinsize # allows variables $COLUMNS/$LINES to be used
trap 'quit' SIGINT # respond to CTRL+C
trap 'setGeometry' WINCH # respond to window resize
IFS=$'\n' # delimit by newline
((! nfetch)) && tabs 4
# define colors
if ((termColors)); then
LightBrown='\e[1;33m'
DarkBrown='\e[0;33m'
BrownGreen='\e[1;32m'
Green='\e[0;32m'
Gray='\e[1;30m'
elif ((nfetch)); then
LightBrown='${c1}'
DarkBrown='${c2}'
BrownGreen='${c3}'
Green='${c4}'
Gray='${c5}'
else
LightBrown='\e[38;5;172m'
DarkBrown='\e[38;5;130m'
BrownGreen='\e[38;5;142m'
Green='\e[38;5;106m'
Gray='\e[38;5;243m'
fi
R='\e[0m'
# create ascii base in lines
case "$baseType" in
1)
width=15
art="\
${Gray}:${Green}___________${DarkBrown}./~~\\.${Green}___________${Gray}:
\\ /
\\________________________/
(_) (_)"
;;
2)
width=7
art="\
${Gray}(${Green}---${DarkBrown}./~~\\.${Green}---${Gray})
( )
(________)"
;;
3)
width=15
art="\
${Gray}╓${Green}───────────${DarkBrown}╭╱⎨⏆╲╮${Green}───────────${Gray}╖
║ ║
╟────────────────────────────╢
╟────────────────────────────╢
╚════════════════════════════╝"
;;
*) art="" ;;
esac
# get base height
baseHeight=0
for line in $art; do
baseHeight=$(( baseHeight + 1 ))
done
# create leafArray
declare -A leafArray
leafArrayLen=0
# parse each string in comma-separated $leafStrs
for str in ${leafStrs//,/$'\n'}; do
leafArray[$leafArrayLen,0]=${#str} # first item in sub-array is length
# for character in string, add to the sub-array
for (( i=0; i < ${#str}; i++ )); do
leafArray[$leafArrayLen,$((i+1))]="${str:$i:1}"
done
leafArrayLen=$((leafArrayLen+1))
done
setGeometry() {
if ((nfetch)) && ((termSize)); then
geometry="$(tput cols),$(tput lines)" # geometry must use tput in this mode
elif ((termSize)); then
geometry="$COLUMNS,$LINES" # these vars automatically update
fi
cols="$(printf '%s' "$geometry" | cut -d ',' -f1)" # width; X
rows="$(printf '%s' "$geometry" | cut -d ',' -f2)" # height; Y
rows=$((rows - baseHeight)) # so we don't grow a tree on top of the base
}
init() {
IFS=$'\n' # delimit strings by newline
# message processing
if ((flag_m)); then
declare -Ag gridMessage
cols=$((cols - messageWidth - 8 )) # make room for the message to go on the right side
message="$(printf '%s\n' "$message" | fold -sw $messageWidth)" # wordwrap message, delimiting by spaces
# get number of lines in the message
messageLineCount=0
for line in $message; do
messageLineCount=$((messageLineCount + 1))
done
messageOffset=$((rows - messageLineCount - 7))
# put lines of message into a grid
index=$messageOffset
for line in $message; do
gridMessage[$index]="$line"
index=$((index + 1))
done
fi
# add spaces before base so that it's in the middle of the terminal
base=""
iter=1
for line in $art; do
filler=""
for (( i=0; i <= (cols / 2 - width); i++)); do
filler+=" "
done
base+="${filler}${line}"
[ $iter -ne $baseHeight ] && base+='\n'
iter=$((iter+1))
done
unset IFS # reset delimiter
# declare vars
branches=0
shoots=0
branchesMax=$((multiplier * 110))
shootsMax=$multiplier
# fill grid full of spaces
declare -Ag grid
for (( row=0; row <= rows; row++ )); do
listChanged[$row]=0
for (( col=0; col < cols; col++ )); do
grid[$row,$col]=' '
done
done
if ((! nfetch)); then
stty -echo # don't echo stdin
printf '%b' '\e[?25l\e[?7l\e[2J' # hide cursor, disable line wrapping, clear screen and move to 0,0
fi
# setup temp file for caching times of each growth
mkdir -p /tmp/bonsai.sh
tmpFile="$(mktemp -p /tmp/bonsai.sh bonsai.sh.XXXXXXXX)"
}
grow() {
local x=$((cols / 2)) # start halfway across the screen
local y="$rows" # start just above the base
branch "$x" "$y" trunk "$lifeStart"
}
branch() {
# declarations
local x=$1
local y=$2
local type=$3
local life=$4
local dx=0
local dy=0
local chars=()
branches=$((branches + 1))
# as long as we're alive...
while [ "$life" -gt 0 ]; do
life=$((life - 1)) # ensure life ends
# set dy based on type
case $type in
shoot*) # trend horizontal/downward growth
case "$((RANDOM % 10))" in
[0-1]) dy=-1 ;;
[2-7]) dy=0 ;;
[8-9]) dy=1 ;;
esac
;;
dying) # discourage vertical growth
case "$((RANDOM % 10))" in
[0-1]) dy=-1 ;;
[2-8]) dy=0 ;;
[9-10]) dy=1 ;;
esac
;;
*) # grow up/not at all
dy=0
[ "$life" -ne "$lifeStart" ] && [ $((RANDOM % 10)) -gt 2 ] && dy=-1
;;
esac
# if we're about to hit the ground, cut it off
[ "$dy" -gt 0 ] && [ "$y" -gt $(( rows - 1 )) ] && dy=0
[ "$type" = "trunk" ] && [ "$life" -lt 4 ] && dy=0
# set dx based on type
case $type in
shootLeft) # tend left: dx=[-2,1]
case $(( RANDOM % 10 )) in
[0-1]) dx=-2 ;;
[2-5]) dx=-1 ;;
[6-8]) dx=0 ;;
[9]) dx=1 ;;
esac ;;
shootRight) # tend right: dx=[-1,2]
case $(( RANDOM % 10 )) in
[0-1]) dx=2 ;;
[2-5]) dx=1 ;;
[6-8]) dx=0 ;;
[9]) dx=-1 ;;
esac ;;
dying) # tend left/right: dx=[-3,3]
dx=$(( (RANDOM % 7) - 3)) ;;
*) # tend equal: dx=[-1,1]
dx=$(( (RANDOM % 3) - 1)) ;;
esac
# re-branch upon conditions
if [ $branches -lt $branchesMax ]; then
# branch is dead
if [ $life -lt 3 ]; then
branch "$x" "$y" dead "$life"
# branch is dying and needs to branch into leaves
elif [ "$type" = trunk ] && [ "$life" -lt $((multiplier + 2)) ]; then
branch "$x" "$y" dying "$life"
elif [[ $type = "shoot"* ]] && [ "$life" -lt $((multiplier + 2)) ]; then
branch "$x" "$y" dying "$life"
# re-branch if: not close to the base AND (pass a chance test OR be a trunk, not have too many shoots already, and not be about to die)
elif [[ $type = trunk && $life -lt $((lifeStart - 8)) \
&& ( $(( RANDOM % (16 - multiplier) )) -eq 0 \
|| ($type = trunk && $(( life % 5 )) -eq 0 && $life -gt 5) ) ]]; then
# if a trunk is splitting and not about to die, chance to create another trunk
if [ $((RANDOM % 3)) -eq 0 ] && [ $life -gt 7 ]; then
branch "$x" "$y" trunk "$life"
elif [ "$shoots" -lt "$shootsMax" ]; then
# give the shoot some life
tmpLife=$(( life + multiplier - 2 ))
[ $tmpLife -lt 0 ] && tmpLife=0
# first shoot is randomly directed
if [ $shoots -eq 0 ]; then
tmpType="shootLeft"
[ $((RANDOM % 2)) -eq 0 ] && tmpType="shootRight"
# secondary shoots alternate from the first
else
case "$tmpType" in
shootLeft) # last shoot was left, shoot right
tmpType="shootRight" ;;
shootRight) # last shoot was right, shoot left
tmpType="shootLeft" ;;
esac
fi
branch "$x" "$y" "$tmpType" "$tmpLife"
shoots=$((shoots + 1))
fi
fi
else # we're past max branches but want to branch
chars=('<->')
fi
# implement dx,dy
x=$((x + dx))
y=$((y + dy))
# choose color
case $type in
trunk|shoot*)
color=$DarkBrown
[ $(( RANDOM % 4 )) -eq 0 ] && color=$LightBrown
;;
dying) color=$BrownGreen ;;
dead) color=$Green ;;
esac
# choose branch character
case $type in
trunk)
if [ $dx -lt 0 ]; then
chars=('\\')
elif [ $dx -eq 0 ]; then
chars=('/' '|')
elif [ $dx -gt 0 ]; then
chars=('/')
fi
[ $dy -eq 0 ] && chars=('/' '~') # not growing
#[ $dy -lt 0 ] && chars=('/' '~') # growing
;;
# shoots tend to look horizontal
shootLeft)
case $dx in
[-3,-1]) chars=('\\' '|') ;;
[0]) chars=('/' '|') ;;
[1,3]) chars=('/') ;;
esac
#[ $dy -lt 0 ] && chars=('/' '~') # growing up
[ $dy -gt 0 ] && chars=('/') # growing down
[ $dy -eq 0 ] && chars=('\\' '_') # not growing
;;
shootRight)
case $dx in
[-3,-1]) chars=('\\' '|') ;;
[0]) chars=('/' '|') ;;
[1,3]) chars=('/') ;;
esac
#[ $dy -lt 0 ] && chars=('') # growing up
[ $dy -gt 0 ] && chars=('\\') # growing down
[ $dy -eq 0 ] && chars=('_' '/') # not growing
;;
esac
# randomly choose leaf character
if [ $life -lt 4 ]; then
chars=()
randIndex=$((RANDOM % leafArrayLen))
# add each char in our randomly chosen list to our chars
for (( i=0; i < ${leafArray[$randIndex,0]}; i++)); do
chars+=("${leafArray[$randIndex,$((i+1))]}")
done
fi
# [ $life -eq 0 ] && chars=('&' '&') # eh, maybe
((verbose)) && printf '%b\n' "$life:\\t$x, $y: $char"
# add this/these character(s) to our grid
index=0
for char in "${chars[@]}"; do
newX=$((x+index))
grid[$y,$newX]="${color}${char}"
# ensure we keep track of last column
[ ${y:-0} -gt 0 ] && [ -n "${listChanged[$y]}" ] && [ ${newX:-0} -gt ${listChanged[$y]} ] && listChanged[$y]=$newX
index=$((index+1))
done
# print what we have so far
if ((live)); then
( time -p display ) 2>"$tmpFile"
elapsed="$(head "$tmpFile" -n 1 | awk '{print $2}' )"
# if this step took less than $stepTime, sleep until $stepTime is met
timeLeft="$(printf '%s\n' "$timeStep - $elapsed" | bc -l)"
[ "$(printf '%s\n' "($timeLeft) > 0" | bc -l)" -eq 1 ] && sleep "$timeLeft"
fi
done
}
display() {
# parse grid for output
output=""
for (( row=0; row < rows; row++)); do
lineArray=()
# only parse to the last known column with a char in it
for (( col=0; col <= listChanged[row]; col++ )); do
((live)) && printf '%b' '\e[0;0H' # move cursor to 00
# grab the character from our grid
lineArray["$col"]="${grid[$row,$col]}"
done
line="${lineArray[*]}" # combine array elements into a string
if ((flag_m)) || ((nfetch)); then
line="${line%${line##*[^[:space:]]}}" # remove trailing whitespace and reset color
fi
# add our message unless line is blank
((flag_m)) && [ ! "$line" = "" ] && line+=' \t'"${R}${gridMessage[$row]}"
IFS=''
output+="$line\\n"
done
output+="$base" # add the ascii-art base we generated earlier
printf '%b' "$output"
}
quit() {
if ((! nfetch)); then
stty echo # echo stdin
printf '%b\n' '\e[?25h\e[?7h'"${R}" # show cursor, enable line wrapping, reset colors
tabs 8
else
printf '\n' # reset formatting, put cursor on next line
fi
exit 0
}
bonsai() {
setGeometry
init
grow
display
}
main() {
bonsai
while ((infinite)); do
sleep "$timeWait"
bonsai
done
}
main
quit
bonsai